Rings Plus Pi Bonds Formulation
For molecules containing only carbon, hydrogen, monovalent halogens, nitrogen, and oxygen, the formula
where C = number of carbons, H = number of hydrogens, X= number of halogens and N = number of nitrogens, gives an equivalent result. Oxygen and other divalent atoms do not contribute to the degree of unsaturation, as (2-2) = 0.
The degree of unsaturation is used to calculate the number of rings and pi bonds, where
- Rings count as one degree of unsaturation
- Double bonds count as one degree of unsaturation
- Triple bonds count as two degrees of unsaturation
Read more about this topic: Degree Of Unsaturation
Famous quotes containing the words rings, bonds and/or formulation:
“We will have rings and things, and fine array,
And kiss me, Kate, we will be married o’ Sunday.”
—William Shakespeare (1564–1616)
“In America a woman loses her independence for ever in the bonds of matrimony. While there is less constraint on girls there than anywhere else, a wife submits to stricter obligations. For the former, her father’s house is a home of freedom and pleasure; for the latter, her husband’s is almost a cloister.”
—Alexis de Tocqueville (1805–1859)
“In necessary things, unity; in disputed things, liberty; in all things, charity.”
—Variously Ascribed.
The formulation was used as a motto by the English Nonconformist clergyman Richard Baxter (1615-1691)